Suddenly, with the influx of ions, the cell’s charge flips from negative to positive. This produces a burst of electricity known as an action potential. That sudden burst triggers the ion gates in the neighboring cell to open too, electrifying that cell in turn. This chain reaction travels fast, sending information via the electric current that the bestirred cells make from your finger (and cheek) to your brain and back again. Almost all our cells are capable of generating electricity. Muscles are electrically active every moment they’re contracting and releasing; it’s electricity that makes
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